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The legends were true... and the consequences could be catastrophic.
When a coded manuscript tied to the lost city of Iram resurfaces and chaos happens across ancient sites, codebreaker Calla Cress races from Crete to Berlin to the Arabian desert to rescue her kidnapped mentor, decode a dead language and prevent a ruthless corporation from weaponising the secrets of the Atlantis of the Sands.
Ten years ago, a young operative broke into Britain’s most secure facility and stole a leather‑bound book filled with an unknown script. Its blank pages pulse with a power tied to an ancient city said to have been swallowed by the desert.
Now, codebreaker Calla Cress receives the same book – and an urgent plea from her former mentor Professor Octavia Steward. Octavia has vanished after revealing artefacts from Iram, the legendary Atlantis of the Sands. Armed with nothing but seven blank pages and her talent for deciphers, Calla must race across continents to decode a dead language and stop a series of bombings targeting ancient sites.
From the ruins of Knossos to the museums of Berlin and the shifting dunes of the Rub’ al Khali, Calla and her team – ex‑Marine Nash Shields and tech genius Jack Kleve – confront secret societies, ruthless mercenaries and a biotech corporation that sees Iram’s mysteries as the key to unimaginable power.
She is haunted by a past expedition to the Arabian desert where an unseen language and collapsing quicksand nearly cost a man his life. The same code now triggers bombs around the world. To solve the puzzle, Calla must unearth the truth about Kronos Genetisys, the shadowy company funding the dig, and decide whether to trust her father’s clandestine Blackhorse Group.
As ancient myth collides with modern terrorism, Calla discovers that the city of pillars hides not only treasures but technology far beyond its time. The secrets in the sand could heal the world or ignite it.
In this electrifying techno‑thriller, Rose Sandy blends archaeological adventure, cyber‑espionage and a pulse‑pounding romance into a story that pits human curiosity against the perils of unfettered science. Fans of Indiana Jones, Tomb Raider and The Da Vinci Code will be captivated by a heroine who must decode history to save the future
Fans of Lara Croft, James Rollins, and Dan Brown will love this pulse-pounding technothriller where archaeological myth meets cyber-espionage and romantic suspense.
Reader Praise
“Explosive, gripping, and mind-twisting—Calla Cress is the heroine thrillers have been waiting for.”
“Equal parts ancient mystery and modern thriller, this book is hard to put down.”
“I couldn’t stop turning the pages—every chapter ups the stakes!”
“A fast-paced treasure hunt with brains, beauty, and danger in every location.”
The Calla Cress Decrypter Thriller Series Reading Order
Book 1: Secret of the Lost Manuscript
Book 2: The Mind Hacker
Book 3: Digital Eyes Only
Book 4: The Storm's Eye
Book 5: The Pythagoras Clause
Book 6: The Beale Ciphers
Book 7: Atlantis of the Sands
Book 8: Kingdom of Diamonds
Find the Full Series here.
Click here for the full reading guide.
Meet the Author – Rose Sandy
Rose Sandy writes adventure thrillers that blend espionage, technology, and history into fast-paced adventures. Her stories dive into the world of covert intelligence, scientific breakthroughs, and global conspiracies—perfect for readers who love suspense with a twist of "what if?" Whether you're on a morning commute or relaxing on a Sunday, her books promise to entertain, surprise, and transport you to hidden corners of the world.
A true globetrotter and lifelong communicator, Rose draws inspiration from historical archives, cutting-edge tech, and conversations with intelligence insiders. When she's not researching in the British Library or exploring Churchill’s War Rooms, she’s crafting thrillers that weave intrigue, action, and a hint of romance.
Discover more [here] or join her newsletter at subscribepage.io/Wuqko4.
Tropes You'll Love:
Lost civilisation & forbidden technology
Dead language and cryptographic bombs
Female-led international thriller
Enemies-to-allies and secret societies
Mentor abduction and shadow conspiracies
Race against time to save the future
Desert ruins, hidden vaults and ancient codes
Trauma, redemption and a second chance
Global chase through Crete, Berlin, and the Arabian desert
Romantic tension under fire
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Locations & Interesting Places in the Book
Knossos Palace, Crete – The site of ancient ruins targeted by enemies encoded in extinct languages.
Berlin, Germany – Location of Professor Octavia Steward’s live television abduction and secret cryptographic vaults beneath museums.
Rub’ al Khali (Empty Quarter), Saudi Arabia/Oman – The fabled location of Iram, the Atlantis of the Sands.
Cheltenham, UK – GCHQ Headquarters – Where an operative once stole the encrypted manuscript that now holds the key to Iram.
London – II Temple Place & Blackhorse Archives – Headquarters of a shadowy group concealing truths about Calla’s past.
Muscat, Oman – Staging ground for the desert expedition with help from Sheik Amir Salib.
Cambridge University – Where Calla’s relationship with her mentor began—and where the tragedy of Ivan Schneider was born.
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| Pages |
398 |
|
Paperback ISBN
|
9781739178130
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| Paperback Dimensions |
5 x 0.51 x 8 inches |
| Language |
English |
| Categories |
Technothriller, Archaeological Adventure, Ancient Civilizations, Espionage, Women’s Fiction, Science Fiction Thriller, Global Mystery, Romantic Suspense
|
| Series |
The Calla Cress Decrypter Thriller Series, Book 7
|
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